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Vertiv / Precision air conditioning

Vertiv Liebert DataMate3000 DME12 Precision AC Equipment information & support

The Vertiv Liebert DataMate3000 DME12 is a 12.5kW industrial-grade precision cooling system tailored for medium-and-small IT rooms. Operating on large airflow and small enthalpy difference principles with a sensible heat ratio exceeding 0.90, it integrates a high-efficiency compliant scroll compressor and intelligent microprocessor controller to maintain continuous 24/7/365 temperature and humidity stabilization.

Equipment information

Brand
Vertiv
Equipment model
Vertiv Liebert DataMate3000 DME12 Precision AC
Equipment type
Precision air conditioning
Controller / software version
Confirm against the installed equipment
View full product specifications
Vertiv Liebert DataMate3000 DME12 12.5kW Compact Computer Room Precision Air Conditioner

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated Cooling Capacity
12.5kW (High Airflow, Low Enthalpy Precision Room Cooling Capacity)
Sensible Heat Ratio SHR
≥ 0.90 (Ultra-High Sensible Heat Ratio for Maximum Sensible Cooling)
Compressor Type
High-Efficiency Compliant Scroll Compressor (High Reliability)
Airflow Organization
Upflow / Front-Return (or Downflow) High-Volume Air Distribution
Controller Positioning
Large Graphical Microprocessor Multi-Language Controller
Refrigerant Type
R410A Eco-Friendly Non-Ozone Depleting Refrigerant

Alarms & troubleshooting

HP_ALM (Compressor High Pressure Lockout)
Alarm LED (Red solid), Run LED (Green off), LCD displays 'HP ALARM'
Outdoor condenser coil fouled or blocked; condenser fan speed controller or motor failure; excessive refrigerant charge; non-condensable gas in refrigeration circuit; defective high-pressure switch.
1. Clean outdoor condenser fins using low-pressure wash to restore heat dissipation airflow. 2. Inspect outdoor fan motor, capacitor, and fan speed controller (FSC) output voltages. 3. Attach manifold gauges to check discharge pressure (cutout threshold ~2.8 MPa / 406 psi); verify refrigerant charge and absence of non-condensables. 4. Once pressure drops below the reset threshold, depress the manual HP reset button and clear the alarm on the controller panel.
LP_ALM (Compressor Low Pressure Lockout)
Alarm LED (Red solid), LCD displays 'LP ALARM', compressor locked out after startup bypass time
Refrigerant loss due to pipe leakage; heavily clogged indoor air filter; indoor blower belt broken or fan failed; thermal expansion valve (TXV) restricted/frozen or bulb charge lost; liquid line solenoid valve failed closed.
1. Inspect indoor return filters and evaporator coil for icing or heavy blockage; clean or replace filters. 2. Verify indoor blower rotation, belt condition/tension, and contactor operation. 3. Connect pressure gauge to suction port; verify operating suction pressure (trip point ~0.15–0.20 MPa / 22–29 psi). If low, perform nitrogen pressure hold and leak detection. 4. Repair leaks, replace the filter drier, evacuate down to <500 microns, recharge according to factory specification, and clear alarm.
AIR_LOSS (Loss of Airflow Alarm)
Alarm LED (Red blinking), LCD displays 'LOSS OF AIRFLOW', heaters and humidifier forced off
Indoor fan motor overload relay tripped; fan belt loose, broken, or slipping; differential pressure switch sampling tubes disconnected, crimped, or blocked with dust; defective air flow pressure switch.
1. Isolate main power, access the fan cabinet, and inspect the drive belt condition and deflection; replace if cracked or broken. 2. Inspect motor windings, verify thermal overload relay rating, reset the overload, and measure running phase currents. 3. Check differential pressure tubes (+/- ports) for kinks, blockages, or disconnections; clear with dry compressed air. 4. Measure static differential pressure with a manometer (typical trip point 50–100 Pa) and verify switch continuity.
HI_TEMP (High Return Air Temperature Alarm)
Alarm LED (Red solid), audible buzzer active, LCD displays and flashes current return temperature
IT thermal load exceeds unit sensible cooling capacity; compressor locked out or failed to stage on; return air temperature/humidity sensor disconnected, drifted, or failed; incorrect temperature setpoint or differential parameter.
1. Compare LCD temperature against a calibrated reference thermo-hygrometer; recalibrate or replace the NTC sensor if offset >2°C. 2. Inspect sensor wiring at mainboard terminals (TB1/CN); measure sensor resistance against temperature-resistance chart. 3. Verify compressor contactor, liquid line solenoid, and sight glass condition to ensure active refrigeration. 4. If cooling operates normally but ambient keeps climbing, inspect IT heat density and bring standby AC units online.
WATER_HIGH (Condensate High Water Alarm)
Alarm LED (Red solid), LCD displays 'HIGH WATER LEVEL', unit cooling/humidifier locked out to prevent overflow
Condensate drain pipe clogged, pinched, or frozen; condensate removal pump power loss or motor winding failure; internal float level switch stuck at high position; drain tray outlet choked with debris.
1. Inspect unit drain pan and clear away bio-algae, dust buildup, and obstructions from drain holes. 2. Check auxiliary voltage supply (220V AC) to the condensate lift pump terminals. 3. Manually toggle the float switch up and down; test dry contact switching state with a multimeter for mechanical stickiness. 4. Flush the discharge pipe with nitrogen or water; pour water into the reservoir to verify pump drainage operation, then clear alarm.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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